
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>CSS圆角</title>
  <style>
    .container {
      width: 100px;
      height: 100px;
      background: red;
      /*border: 10px solid green;*/
      border-radius: 10px;
      /* border-radius: 50%; */
      /*border: 50px solid green;
      border-top-left-radius: 100px 50px;
      border-top-right-radius: 0;
      border-bottom-left-radius: 0;
      border-bottom-right-radius: 0;*/
      /*border-radius: 10px 10px 10px 10px / 20px 20px 20px 20px;*/
    }
  </style>
</head>
<body>
  <div class="container">
  </div>
</body>
</html>
